Screen Notes
===

Resistive touchscreens are probably a necessity as drivers wearing normal gloves will
not be able to trigger input events to the DIU screen.

There are standard 5 inch resistive touch screens that are available for the RPi.
I've found one that has an HDMI adapter, USB power, USB mouse out and a 3.5mm audio
jack ([src](https://www.amazon.com/gp/product/B07C3ZX8BZ)).

Calibration
---

I'm still a bit unclear about this, but running this 'out of the box' looks like it improved things (?):

```
sudo bash
apt-get install libts-bin
ts_calibrate
```

There's another program called `ts_test` but I'm having trouble getting that to run.

Sound Issues
---

Sometimes the first few seconds of sound gets cut off.
I believe this is caused by the HDMI sound 'going to sleep'.

The following looks to fix the issue:

```
vcgencmd force_audio hdmi 1
```

If this issue is present, adding the above line to `rc.local` is advisable.

I believe I'm still hearing the issue after some time.
Maybe there's a time limit
or maybe something else makes it go back into it's default state of 'sleep' (the 'dim'
function perhaps?) so this might need to be done periodically or on a trigger.

References
---

* Amazon link to ["5inch Raspberry pi LCD HDMI Display Module Resistive Touch Screen 800480 High Resolution HDMI Interface Supports Multi Mini-PCs Multi Systems"](https://www.amazon.com/gp/product/B07C3ZX8BZ).
* [Raspberry Pi Touchscreen Calibration Screen Rotation](http://www.circuitbasics.com/raspberry-pi-touchscreen-calibration-screen-rotation/)
